您好我正在开发购物车。向客户展示了客户订购的产品。所有产品及其详细信息都存储在会话变量中。如果他愿意，他可以改变每种产品的数量。当他改变产品的数量时，相应的价格会发生变化。我已经使用了jquery。现在我需要在更改数量时更新会话变量。我也必须展示它。 这是我的代码。
<?php
session_start();
include('head.php');
?>
<!DOCTYPE HTML>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script>
$(document).ready(function() {
$(".myclass").change(function(){
var identifier = $(this).attr('id');
var Qty = $(this).val();
var Price = $("#price_"+identifier).val();//price value
var Total = Qty * Price;
$("#priceDisplay_"+identifier).html(Total);
GrandTotal();
});
GrandTotal();
});
function GrandTotal(){
var GrandTotal=0;
var cart=0;
$(".myclass").each(function(){
var identifier = $(this).attr('id');
var Qty = $(this).val();
var Price = $("#price_"+identifier).val();//price value
cart +=parseInt(Qty);
var Total = Qty * Price;
GrandTotal += Total;
$("#priceDisplay_"+identifier).html(Total);
});
$("#cart").html(cart);
$("#GrandTotal").html(GrandTotal);
}
function RemoveCart(ob){
if (confirm("Are you sure to Remove?"))
{
var IdForRemove =ob.value;
$.ajax({
type: "POST",
url: "RemoveCart.php",
dataType:'json',
data: { id: IdForRemove}
})
.done(function( data ) {
$("#GrandTotal").html(data.Grandtotal);
$("#cart").html(data.cart);
$("#"+IdForRemove).remove();
});
return false;
}
}
</script>
</head>
<body>
<?php
if(empty($_SESSION['items'])){ ?>
<center><b><font color="red">There are no products in your cart!!</font></b> </center>
<?php
}
else
{
?>
<b><font color="#0000A0"> Your Shopping Cart!!</font></b><br><br>
<form name="formview" action="orderform.php" method="post">
<?php $count=0;
?>
<table id="mytable" width="50%" cellpadding="1px" cellspacing="3px" border="1" bgcolor="#BDEDFF">
<tr>
<th>Item</th>
<th>Price</th>
<th>Quantity</th>
<th>Subtotal</th>
<th>Remove</th>
</tr>
<?php
$cnt=0;
$CartR = $_SESSION['r'];
foreach( $CartR as $key=>$ar):
$Identifier = 'qty_'.$cnt;
?> <tr id="<?php echo $ar['Id']; ?>">
<td align="center"><?php echo $ar['Name']?></td>
<td align="center"><?php echo $ar['Price']?></td>
<td align="center">
<select class="myclass" name="qty" id='<?php echo $Identifier;?>' >
<?php for ($i=1; $i<=100; $i++) {
$y="";
if( $i==$_SESSION['r'][$key]['Quantity']){
$y="selected";
}
echo "<option ";
echo "value=\"$i\" ".$y.">", $i, "</option>\n";
} ?>
</select>
</td>
<?php $x=$x+$ar['Quantity']; ?>
<td name="price"><span id="priceDisplay_<?php echo $Identifier;?>"><?php echo $ar['Total']; ?></span></td>
<input type='hidden' name='id' id="pid_<?php echo $Identifier;?>" value='<?php echo $ar['Id']; ?>'>
<input type='hidden' name='price' id="price_<?php echo $Identifier;?>" value='<?php echo $ar['Price'] ?>' class="input">
<td>
<input type="checkbox" onclick="RemoveCart(this)" value="<?php echo $ar['Id']; ?>">
<?php $tt[]=$ar['Total']; ?>
</tr>
<?php
$cnt++;
endforeach;
?> </table>
<br><br>
<table>
<tr></tr>
<tr><b><font color="B048B5">Grand Total :</font></b> <span id="GrandTotal"></span></tr>
<b><!--<font color="#F6358A">Your Cart:--></font></b><div align="center" id="cart"></div>
<center> <img src="upload/images.jpeg" width="100"></center>
</table>
<!--<table align="right">-->
<?php foreach($tt as $t)
{
$count=$count+$t;
}
?>
<br>
<br>
<!--<b><div id="cart">Your Cart:</div></b> -->
<?php
}
if(!empty($_SESSION['r']))
{ ?>
<input type="submit" name="checkout" value="CheckOut">
<?php } ?>
<a href="ebazaar.php"><b><font color="#7D0541">Back</font></b></a>
</form>
</body>
我使用jquery进行的更改也应该更改我的php变量。
答案 0 :(得分：0)
你能试试吗？
添加了UpdateCart功能，
function UpdateCart(Qty, IDCart){
$.ajax({
type: "POST",
url: "UpdateCart.php",
dataType:'json',
data: {id:IDCart, Qty: Qty}
})
.done(function( data ) {
});
return false;
}
$(".myclass").change(function(){
var identifier = $(this).attr('id');
var Qty = $(this).val();
var Price = $("#price_"+identifier).val();//price value
var Total = Qty * Price;
$("#priceDisplay_"+identifier).html(Total);
var IDCart = $("#pid_"+identifier).val();//passing reference value
UpdateCart(Qty, IDCart);//added this for update qty
GrandTotal();
});
GrandTotal();
});
创建一个新文件：UpdateCart.php
<?php session_start();
if(isset($_POST['id'])){
$toBeUpdate =$_POST['id'];
$CartR =$_SESSION['r'];
$Quantity = $_POST['Qty'];
foreach($CartR as $key=>$Cart){
if($Cart['Id']==$toBeUpdate){
$_SESSION['r'][$key]['Quantity']=$Quantity;
}
}
echo json_encode(array('success'=> true));
}
?>